WORLD CONVERSION JAVA -> BEDROCK FAILS TO REPLACE REALM WORLD

Realms are great. However, after converting my Java world, mind you, it took me 4 years to build, I want to be able to convert it to the Minecraft Realms Plus*. Here is the kicker. I can convert this world and play in it in Win 10 edition without any issue on single player mode. But as soon as I go to replace my current realm, I get to the 'Initializing World' portion of dialogs and then nothing happens. Thereafter, trying a second time, I render and error. 

• I have tried exporting the world in single player mode, and then re-importing it in hopes it would allow me to replace my realm.
• I am able to upload/replace realms that are not Java.
• I did convert the world using the MCC Tool Chest PE with success.
• It does say while uploading: "Level Export Success!"

I am trying to preserve a world that my friends and I have worked so hard on. Any ideas would be helpful...

Thanks!